Cool underwater products

Here is a general listing, with photos, and sometimes prices.  Here is the most advanced "tourist submarine" available.  You can buy this "acrylic viewport globe" -- modeled by an Italian designer -- for only a few million.  Nor should you ignore this aquatic home, which remains unpriced and perhaps does not yet exist.  Here is evidence that the company is for real; see here also.  The film industry is one of their customers.  Here is their rationale for price discrimination.

Many thanks to Catherine for the pointer.